libpayload: lpgcc: CFLAGS and CMDLINE order inversion

When building an external payload with lpgcc, the provided cmdline needs to be
included before libpayload-specific CFLAGS so that the include priority is the
payload first. This way, a payload using e.g. Kconfig that declares a config.h
will have its config.h included first, instead of libpayload's config.h.

Change-Id: I19b8012623e04c92a427d74904aed7f3bf5f0996
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-on: http://review.coreboot.org/11113
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/payloads/libpayload/bin/lpgcc b/payloads/libpayload/bin/lpgcc
index 1dbd716..9346639 100755
--- a/payloads/libpayload/bin/lpgcc
+++ b/payloads/libpayload/bin/lpgcc
@@ -165,10 +165,10 @@
 
 if [ $DOLINK -eq 0 ]; then
     if [ $DEBUGME -eq 1 ]; then
-    	echo "$DEFAULT_CC $_CFLAGS $CMDLINE"
+	echo "$DEFAULT_CC $CMDLINE $_CFLAGS"
     fi
 
-    $DEFAULT_CC $_CFLAGS $CMDLINE
+    $DEFAULT_CC $CMDLINE $_CFLAGS
 else
     if [ -z "${CONFIG_LP_ARCH_MIPS}" ]; then
         _LIBGCC=`$DEFAULT_CC $_ARCHEXTRA -print-libgcc-file-name`
@@ -182,7 +182,7 @@
 	    exit 1
     fi
     if [ $DEBUGME -eq 1 ]; then
-	echo "$DEFAULT_CC $_CFLAGS $_LDFLAGS $HEAD_O $CMDLINE -lpayload $_LIBGCC"
+	echo "$DEFAULT_CC $_LDFLAGS $HEAD_O $CMDLINE $_CFLAGS -lpayload $_LIBGCC"
     fi
 
     # Note: $_ARCHLIBDIR/head.o must be the first object being linked, because it
@@ -190,5 +190,5 @@
     # header to be placed below 0x2000 in the resulting image.  See:
     # http://www.gnu.org/software/grub/manual/multiboot/html_node/OS-image-format.html
 
-    $DEFAULT_CC $_CFLAGS $_LDFLAGS $HEAD_O  $CMDLINE -lpayload $_LIBGCC
+    $DEFAULT_CC $_LDFLAGS $HEAD_O $CMDLINE $_CFLAGS -lpayload $_LIBGCC
 fi