groonga: add the pgp key to validate the source tarball

mingw-w64-groonga/PKGBUILD

@@ -10,7 +10,7 @@ arch=('any')
 url="http://groonga.org/"
 license=('LGPL2')
 options=('strip' 'staticlibs')
-source=("https://packages.groonga.org/source/${_realname}/${_realname}-${pkgver}.tar.gz")
+source=(https://packages.groonga.org/source/${_realname}/${_realname}-${pkgver}.tar.gz{,.asc})
 depends=("${MINGW_PACKAGE_PREFIX}-arrow"
          #"${MINGW_PACKAGE_PREFIX}-libevent"
          "${MINGW_PACKAGE_PREFIX}-luajit"
@@ -26,7 +26,9 @@ depends=("${MINGW_PACKAGE_PREFIX}-arrow"
          "${MINGW_PACKAGE_PREFIX}-zlib"
          "${MINGW_PACKAGE_PREFIX}-zstd")
 makedepends=("${MINGW_PACKAGE_PREFIX}-gcc")
-sha256sums=('e0d60ecbf441f86fe8a7e2448ec2e5b1e0a9f26405a71258abb2940d69c53213')
+sha256sums=('e0d60ecbf441f86fe8a7e2448ec2e5b1e0a9f26405a71258abb2940d69c53213'
+            'SKIP')
+validpgpkeys=('2701F317CFCCCB975CADE9C2624CF77434839225') # Groonga Key <packages@groonga.org>
 
 build() {
   [[ -d ${srcdir}/build-${CARCH} ]] && rm -rf ${srcdir}/build-${CARCH}