gprbuild: remove trailing whitespace

mingw-w64-gprbuild/PKGBUILD

@@ -66,7 +66,7 @@ package() {
   make prefix="${pkgdir}${MINGW_PREFIX}" INSTALL=cp install
 
   # Copy License Files
-  install -Dm644 -t "${pkgdir}${MINGW_PREFIX}/share/licenses/${_realname}/" COPYING* 
+  install -Dm644 -t "${pkgdir}${MINGW_PREFIX}/share/licenses/${_realname}/" COPYING*
 
   # Copy gprconfig knowledge base
   install -Dm644 -t "${pkgdir}${MINGW_PREFIX}/share/gprconfig" "${srcdir}/gprconfig_kb-${_gh_release}"/db/*