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Prevent erroneous inline optimization of initfini.s on PowerPC64.

The problem and the fix was reported there:
http://sourceware.org/ml/libc-alpha/2012-01/msg00195.html
Git commit:
commit 1fe05ea95e1460e5e1cf1568a8ce3982f0f02de6
Author: Ryan S. Arnold <rsa@us.ibm.com>
Date: Tue May 3 17:26:17 2011 -0500

--- glibc.orig/sysdeps/powerpc/powerpc64/Makefile	2012-12-22 19:10:06.713568781 -0800
+++ glibc/sysdeps/powerpc/powerpc64/Makefile	2012-12-22 19:10:50.318605517 -0800
@@ -31,7 +31,7 @@
 ifneq ($(elf),no)
 # The initfini generation code doesn't work in the presence of -fPIC, so
 # we use -fpic instead which is much better.
-CFLAGS-initfini.s += -fpic -O1
+CFLAGS-initfini.s += -fpic -O1 -fno-inline
 endif
 endif