Merge branch 'stdio.h-regex.h-add-macros' into 'master'

stdio.h: add std{in,out,err} macros; regex.h: add REG_MINIMAL macro

See merge request redox-os/relibc!911

include/bits/stdio.h

@@ -9,5 +9,9 @@ typedef struct FILE FILE;
 // A typedef doesn't suffice, because libgmp uses this definition to check if
 // STDIO was loaded.
 #define FILE FILE
+// Likewise, stdin, stdout, and stderr are expected to be macros.
+#define stdin stdin
+#define stdout stdout
+#define stderr stderr
 
 #endif /* _BITS_STDIO_H */

src/header/regex/mod.rs

@@ -35,6 +35,7 @@ pub const REG_NOSUB: c_int = 4;
 pub const REG_NEWLINE: c_int = 8;
 pub const REG_NOTBOL: c_int = 16;
 pub const REG_NOTEOL: c_int = 32;
+pub const REG_MINIMAL: c_int = 64;
 
 pub const REG_NOMATCH: c_int = 1;
 pub const REG_BADPAT: c_int = 2;