Fix bugs with SPEC2k for WebAssembly

tests/spec2k/197.parser/diff

+diff -Naurb src2/header.h src/header.h
+--- src2/header.h 2016-08-12 18:09:40.819477666 -0700
++++ src/header.h 2016-08-12 18:07:15.157315463 -0700
+@@ -23,7 +23,9 @@
+ #include <sys/resource.h>   /* ditto                                     */
+ #endif
+ 
++#ifndef __EMSCRIPTEN__
+ int strncasecmp(const char *s1, const char *s2, size_t);

[Derek Schuff, 2016/08/15 17:57:45]

This declaration is the same as the one for strncasecmp in strings.h. Is it
necessary to ifdef the declaration too? i.e. can we get away with just ifdefing
the definition? (Or is emscripten's header declaration different?)

[ddchen, 2016/08/16 04:58:51]

Done.

++#endif
+ void mark_allocation_point(void);
+ void reset_allocation_point(void);
+ void initialize_memory(void);
+diff -Naurb src2/strncasecmp.c src/strncasecmp.c
+--- src2/strncasecmp.c 2016-08-12 18:09:40.819477666 -0700
++++ src/strncasecmp.c 2016-08-12 18:09:14.667089431 -0700
+@@ -3,7 +3,9 @@
+ 
+ #ifdef TEST
+ #include <stdio.h>
++#ifndef __EMSCRIPTEN__
+ int strncasecmp(const char *s1, const char *s2, size_t n);
++#endif
+ 
+ int main (int argc, char *argv[]) {
+        if (argc != 4) {
+@@ -15,6 +17,7 @@
+ }
+ #endif
+ 
++#ifndef __EMSCRIPTEN__
+ int strncasecmp(const char *s1, const char *s2, size_t n)
+ {
+ 
+@@ -35,5 +38,6 @@
+        if (*j) return  1;
+        return 0;
+ }
++#endif
+ 
+