build: Don't use the deprecated INCLUDES in the various Makefile.am

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/src/gb/Makefile.am b/src/gb/Makefile.am
index 04d2108..8b7473d 100644
--- a/src/gb/Makefile.am
+++ b/src/gb/Makefile.am
@@ -2,8 +2,7 @@
 # Please read Chapter 6 "Library interface versions" of the libtool documentation before making any modification
 LIBVERSION=2:0:0
 
-INCLUDES = $(all_includes) -I$(top_srcdir)/include
-AM_CFLAGS = -Wall ${GCC_FVISIBILITY_HIDDEN} -fno-strict-aliasing
+AM_CFLAGS = -Wall ${GCC_FVISIBILITY_HIDDEN} -fno-strict-aliasing $(all_includes) -I$(top_srcdir)/include
 
 # FIXME: this should eventually go into a milenage/Makefile.am
 noinst_HEADERS = common_vty.h