libgo patch committed: Fix runtime/pprof test when libgo compiled with -O0

[Ian Lance Taylor]

The runtime/pprof package builds stack traces that skip runtime
functions.  When libgo is compiled with -O0, the function profilealloc
appears on the stack trace, but the package doesn't know to skip it.
Rename the function so that it is skipped.  This lets the
runtime/pprof test pass when libgo is compiled with -O0.  Bootstrapped
and ran Go testsuite on x86_64-unknown-linux-gnu.  Committed to
mainline.

Ian
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diff -r 98c204d2dfae libgo/runtime/malloc.goc
--- a/libgo/runtime/malloc.goc	Wed May 06 15:59:21 2015 -0700
+++ b/libgo/runtime/malloc.goc	Mon May 11 09:03:05 2015 -0700
@@ -64,7 +64,7 @@
   __asm__ (GOSYM_PREFIX "runtime.MemProfileRate");
 
 static MSpan* largealloc(uint32, uintptr*);
-static void profilealloc(void *v, uintptr size);
+static void runtime_profilealloc(void *v, uintptr size);
 static void settype(MSpan *s, void *v, uintptr typ);
 
 // Allocate an object of at least size bytes.
@@ -250,7 +250,7 @@
 		if(size < (uintptr)rate && size < (uintptr)(uint32)c->next_sample)
 			c->next_sample -= size;
 		else
-			profilealloc(v, size);
+			runtime_profilealloc(v, size);
 	}
 
 	m->locks--;
@@ -290,7 +290,7 @@
 }
 
 static void
-profilealloc(void *v, uintptr size)
+runtime_profilealloc(void *v, uintptr size)
 {
 	uintptr rate;
 	int32 next;