scripts: Probe external toolchains for libthread-db

libthread-db is a package that can be configured for external
toolchains, so let's have the script probe for it.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
(cherry picked from commit 6704410b158b47aecf507971ad2ee5e3db840e3a)

diff --git a/scripts/ext-toolchain.sh b/scripts/ext-toolchain.sh
index 09390c5e0d51f5195f776507593a29a48d77c614..fbe8639c9c558a4ea8ea74ebccc36be64ecc1a0d 100755 (executable)
--- a/scripts/ext-toolchain.sh
+++ b/scripts/ext-toolchain.sh
@@ -35,6 +35,7 @@ LIB_SPECS="
        rt:       librt-* librt
        pthread:  libpthread-* libpthread
        stdcpp:   libstdc++
+       thread_db: libthread-db
        gcc:      libgcc_s
        ssp:      libssp
        gfortran: libgfortran