Clean up libpayload lpgcc and lpas scripts.

lpgcc and lpas are called by payload Makefiles to properly
build and link with libpayload.

Made lpas use the proper crosscompile AS, as lpgcc does with CC.
Added V=1 support to help users debug the build.
Fix basename $CC and $AS expansion.

Change-Id: Ia4dc8ba53ba7565521a79f1520155f3307b09f85
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/1993
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/payloads/libpayload/bin/lpgcc b/payloads/libpayload/bin/lpgcc
index b102c85..241f157 100755
--- a/payloads/libpayload/bin/lpgcc
+++ b/payloads/libpayload/bin/lpgcc
@@ -27,20 +27,26 @@
 ## SUCH DAMAGE.
 
 # GCC wrapper for libpayload
+if [ -z "${V}" ] && [ "${V}" = 1 ]; then
+	DEBUGME=1
+else
+	DEBUGME=0
+fi
+
+if [ $DEBUGME -eq 1 ]; then
+	echo "CC = $CC"
+fi
+
 # let's not recurse.
 # This is a hack, I know, but it makes sure that really simple user errors
 # don't fork-bomb your machine.
-# echo "CC = $CC"
-
 if [ -n "$CC" ]; then
-b=`basename $CC`
+b=`basename "$CC"`
 if [ "$b" = "lpgcc" ]; then
 CC=""
 fi
 fi
 
-
-
 if [ "$CC" != "" ]; then
 DEFAULT_CC=$CC
 else
@@ -62,7 +68,6 @@
 	return $?
 }
 
-DEBUGME=0
 DOLINK=1
 
 # This variable will contain the command line that the user wants to