libosmogb: build without strict aliasing rules
This allows us to reliably do the trick with casting structures like
libgb_msgb_cb to the msgb->cb[] array. Shamelessly stolen from the
Linux kernel.
diff --git a/src/gb/Makefile.am b/src/gb/Makefile.am
index 9d1b786..71d4736 100644
--- a/src/gb/Makefile.am
+++ b/src/gb/Makefile.am
@@ -3,7 +3,7 @@
LIBVERSION=2:0:0
INCLUDES = $(all_includes) -I$(top_srcdir)/include
-AM_CFLAGS = -Wall ${GCC_FVISIBILITY_HIDDEN}
+AM_CFLAGS = -Wall ${GCC_FVISIBILITY_HIDDEN} -fno-strict-aliasing
# FIXME: this should eventually go into a milenage/Makefile.am
noinst_HEADERS = common_vty.h