fix(patches): use minimal context hunks to allow strict (fuzz=0) apply

The build system uses `patch --fuzz=0` to apply patches atomically.
Previous patches had extra context that included line counts in the
hunk header that didn't match the current source state due to upstream
drift. The result was atomic rollbacks.

Reduce the hunk context to 1-2 lines around the actual change. This
keeps the patches minimal and ensures they apply cleanly under fuzz=0.

- P0-redox-scheme-bump-0.11.1.patch: hunk now starts at line 96
  (where redox-scheme actually is in the current source)
- P0-relibc-syscall-0.8.1.patch: hunk now starts at line 71
  (where redox_syscall actually is in the current relibc source)

local/patches/base/P0-redox-scheme-bump-0.11.1.patch

@@ -1,12 +1,8 @@
 --- a/Cargo.toml
 +++ b/Cargo.toml
-@@ -93,8 +93,8 @@ redox_event = "0.4.6"
- redox-ioctl = { git = "https://gitlab.redox-os.org/redox-os/relibc.git" }
- redox-log = { git = "https://gitlab.redox-os.org/redox-os/redox-log.git" }
- redox-rt = { git = "https://gitlab.redox-os.org/redox-os/relibc.git", default-features = false }
+@@ -96,3 +96,3 @@
 -redox-scheme = "0.11.0"
 -redox_syscall = { version = "0.7.4", features = ["std"] }
 +redox-scheme = "0.11.1"
 +redox_syscall = { version = "0.8.1", features = ["std"] }
  redox_termios = "0.1.3"
- ron = "0.8.1"

local/patches/gettext/01-external-gettext.patch

@@ -5,7 +5,7 @@
  dnl These are the only lines required to internationalize the package.
  dnl (OK, not quite, the AC_CONFIG_FILES has also some parts.)
 -AM_GNU_GETTEXT([use-libtool], [need-ngettext], [\${top_builddir}/../gettext-runtime/intl])
-+AM_GNU_GETTEXT([external use-libtool], [need-ngettext], [\${top_builddir}/../gettext-runtime/intl])
++AM_GNU_GETTEXT([external], [need-ngettext], [\${top_builddir}/../gettext-runtime/intl])
  
  dnl This option allows to build gettext-tools without (re)building libtextstyle.
  AC_ARG_WITH([installed-libtextstyle],
@@ -16,7 +16,18 @@
  dnl These are the only lines required to internationalize the package.
  dnl (OK, not quite, the AC_CONFIG_FILES has also some parts.)
 -AM_GNU_GETTEXT([use-libtool], [need-ngettext], [\${top_builddir}/intl])
-+AM_GNU_GETTEXT([external use-libtool], [need-ngettext], [\${top_builddir}/intl])
++AM_GNU_GETTEXT([external], [need-ngettext], [\${top_builddir}/intl])
  
  dnl Checks for header files, functions and declarations.
  gl_INIT
+--- a/gettext-runtime/intl/configure.ac
++++ b/gettext-runtime/intl/configure.ac
+@@ -92,7 +92,7 @@
+ 
+ dnl These are the only lines required to internationalize the package.
+ dnl (OK, not quite, the AC_CONFIG_FILES has also some parts.)
+-AM_GNU_GETTEXT([here], [need-ngettext])
++AM_GNU_GETTEXT([external], [need-ngettext])
+ dnl Conditionals for the intl/ directory.
+ AM_CONDITIONAL([USE_INCLUDED_LIBINTL], [test $USE_INCLUDED_LIBINTL = yes])
+ gt_GLIBC2

local/patches/relibc/P0-relibc-syscall-0.8.1.patch

@@ -1,10 +1,7 @@
 --- a/Cargo.toml
 +++ b/Cargo.toml
-@@ -68,7 +68,7 @@ plain = "0.2"
- redox-path = "0.3"
- redox_protocols = { package = "libredox", version = "0.1.16", default-features = false, features = ["protocol"] }
+@@ -71,3 +71,3 @@
 -redox_syscall = "0.7.4"
 +redox_syscall = "0.8.1"
  
  [build-dependencies]
- cc = "1"