ccache(4.8.3): add function CHECK

NB: Running check, CCACHE segfaults in the first test, then hangs in the
    second.  This needs to be fixed.

ccache/PKGBUILD

@@ -3,7 +3,7 @@
 
 pkgname=ccache
 pkgver=4.8.3
-pkgrel=2
+pkgrel=3
 pkgdesc="A compiler cache (mingw-w64)"
 arch=('i686' 'x86_64')
 url="https://ccache.samba.org/"
@@ -38,6 +38,11 @@ build() {
   cmake --build .
 }
 
+check() {
+  cd "build-${CHOST}"
+  /usr/bin/ctest .
+}
+
 package() {
   cd "${srcdir}/build-${CHOST}"
   DESTDIR="${pkgdir}" cmake --build . --target install