openssl: run test suite with parallel jobs

The OpenSSL test suite runs via Perl's Test::Harness, which defaults to
sequential execution (HARNESS_JOBS=1) unless told otherwise. With 342
test files, sequential execution takes well over an hour on CI. Setting
HARNESS_JOBS=8 brings this down to about 12 minutes on a 6-core machine,
as verified locally (710 wallclock seconds, 4335 tests, all passing).

The default of 8 is a reasonable middle ground: high enough to saturate
typical CI agents, low enough to avoid file descriptor exhaustion. The
value can still be overridden via the environment for machines where a
different number is appropriate.

Assisted-by: Claude Opus 4.6
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

mingw-w64-openssl/PKGBUILD

@@ -157,7 +157,7 @@ build() {
 check() {
   cd "${srcdir}/build-${MSYSTEM}"
 
-  make VERBOSE_FAILURE=1 TESTS=-test_symbol_presence test
+  HARNESS_JOBS=${HARNESS_JOBS:-8} make VERBOSE_FAILURE=1 TESTS=-test_symbol_presence test
 }
 
 _package() {