build_library: Fix setting gcc profile with latest gcc-config

In order to fix some bash-completion issues, the output of "gcc-config
-l" has changed slightly - it received one more leading space in the
output.

Old output:

 [1] aarch64-cros-linux-gnu-15 *

New output:

  [1] aarch64-cros-linux-gnu-15 *

This has added another field from cut's point of view, as it was
splitting the line into fields by single spaces, which means that
instead of getting "aarch64-cros-linux-gnu-15" we were getting
"[1]". This has caused grep to match nothing, setting the error status
in PIPESTATUS and finally a function failure.

Instead of fiddling with leading empty fields, just strip the leading
spaces, dammit.

Signed-off-by: Krzesimir Nowak <knowak@microsoft.com>

build_library/toolchain_util.sh

@@ -490,10 +490,14 @@ binutils_set_latest_profile() {
 # The extra flag can be blank, hardenednopie, and so on. See gcc-config -l
 # Usage: gcc_get_latest_profile chost [extra]
 gcc_get_latest_profile() {
-    local prefix="${1}-"
-    local suffix="${2+-$2}"
+    local prefix=${1}
+    local suffix=${2+-${2}}
     local status
-    gcc-config -l | cut -d' ' -f3 | grep "^${prefix}[0-9\\.]*${suffix}$" | tail -n1
+    gcc-config --list-profiles --nocolor | \
+        sed -e 's/^\s*//' | \
+        cut -d' ' -f2 | \
+        grep "^${prefix}-[0-9\\.]*${suffix}$" | \
+        tail -n1
 
     # return 1 if anything in the above pipe failed
     for status in ${PIPESTATUS[@]}; do