Facilitate debugging Git executables in tests with gdb

When prefixing a Git call in the test suite with 'TEST_GDB_GIT=1 ', it
will now be run with GDB, allowing the developer to debug test failures
more conveniently.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

wrap-for-bin.sh

@@ -19,4 +19,11 @@ GIT_TEXTDOMAINDIR='@@BUILD_DIR@@/po/build/locale'
 PATH='@@BUILD_DIR@@/bin-wrappers:'"$PATH"
 export GIT_EXEC_PATH GITPERLLIB PATH GIT_TEXTDOMAINDIR
 
+if test -n "$TEST_GDB_GIT"
+then
+	exec gdb -args "${GIT_EXEC_PATH}/@@PROG@@" "$@"
+	echo "Could not run gdb -args ${GIT_EXEC_PATH}/@@PROG@@ $*" >&2
+	exit 1
+fi
+
 exec "${GIT_EXEC_PATH}/@@PROG@@" "$@"