Stop asking GCC to cause trouble.

Why do we see so many bogus strict-aliasing warnings? Because we asked GCC to
cause trouble on arm and mips.

Change-Id: I25d7fd036b6afff7ccfa799abe0dc1579ead2847
diff --git a/libc/arch-arm/arm.mk b/libc/arch-arm/arm.mk
index 0e9beba..55f9978 100644
--- a/libc/arch-arm/arm.mk
+++ b/libc/arch-arm/arm.mk
@@ -41,10 +41,7 @@
 #    bionic/__strcpy_chk.cpp \
 #    bionic/__strcat_chk.cpp \
 
-# cflags
-libc_common_cflags_arm := \
-    -DSOFTFLOAT \
-    -fstrict-aliasing
+libc_common_cflags_arm := -DSOFTFLOAT
 
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 ### CPU specific source files