buildgcc: Fix the options check

1. Add -P|--package to build iasl
2. Remove -G|--skip-gdb, which was to skip gdb.
3. Add -S|--scripting to build gdb
4. Remove -C|--clang, which was to build clang.

All these changes are aligned with the options parsing below.
The help text is correct.

Change-Id: I897ea5e8ab002086e45bf05ff33230815b246057
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/11158
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index eaeafcf..bd0d8ef 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -499,11 +499,11 @@
 getoptbrand="$(getopt -V | sed -e '1!d' -e 's,^\(......\).*,\1,')"
 if [ "${getoptbrand}" = "getopt" ]; then
 	# Detected GNU getopt that supports long options.
-	args=$(getopt -l version,help,clean,directory:,platform:,jobs:,destdir:,savetemps,skip-gdb,ccache,clang Vhcd:p:j:D:tGyC -- "$@")
+	args=$(getopt -l version,help,clean,directory:,platform:,package:,jobs:,destdir:,savetemps,scripting,ccache Vhcd:p:P:j:D:tSy -- "$@")
 	eval set "$args"
 else
 	# Detected non-GNU getopt
-	args=$(getopt Vhcd:p:j:D:tGyC $*)
+	args=$(getopt Vhcd:p:P:j:D:tSy $*)
 	set -- $args
 fi