ANDROID: GKI: remove info print for header generation

Script doesn't honor the Kernel's quiet command
mechanism with KBuild; so need to remove info
only echo. Added set -x in case make V=1 for keeping
debugging handy for script in the future.

Bug: 234116152
Test: TH
Signed-off-by: Ramji Jiyani <ramjiyani@google.com>
Change-Id: Iea881816b9bc8c47157a33da67d6cf5f8357a7be
(cherry picked from commit 08a1879c87)

scripts/gen_gki_modules_headers.sh

@@ -26,6 +26,12 @@ set -e
 #
 # Common Definitions
 #
+# Use "make V=1" to debug this script.
+case "$KBUILD_VERBOSE" in
+*1*)
+	set -x
+	;;
+esac
 
 #
 # generate_header():
@@ -38,7 +44,6 @@ generate_header() {
 	local symbol_file=$2
 	local symbol_type=$3
 
-	echo "  GEN     ${header_file}"
 	if [ -f "${header_file}" ]; then
 		rm -f -- "${header_file}"
 	fi