llvm: Increase timeout for picolibc testing

compiler-rt has very slow floating point emulation which causes the
long-double test to timeout on riscv. Increase the timeout by a factor
of 20 to avoid this issue.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

scripts/llvm/test-support/run-picolibc-tests.py

@@ -67,7 +67,7 @@ def run_tests(meson_command, source_dir, build_dir, variant):
     )
 
     returncode = subprocess.run(
-        [meson_command, "test"],
+        [meson_command, "test", "-t", "20"],
         cwd=build_dir,
     ).returncode