main/iscsitarget-grsec: set ksrc in package()

fixes #371Signed-off-by: Cedric Schieli <cschieli@gmail.com>
(cherry picked from commit 95e8811c)

main/iscsitarget-grsec/APKBUILD

@@ -15,7 +15,7 @@ _iscsiver=1.4.19
 
 pkgname=${_realname}-${_flavor}
 pkgver=$_kver
-_mypkgrel=0
+_mypkgrel=1
 pkgrel=$(($_kpkgrel + $_mypkgrel))
 pkgdesc="$_flavor kernel modules for iscsitarget $_iscsiver"
 url="http://iscsitarget.sourceforge.net/"
@@ -45,6 +45,7 @@ build() {
 
 package() {
 	cd "$srcdir"/$_realname-$_iscsiver
+	local ksrc=/usr/src/linux-headers-${_abi_release}
 	make KSRC="$ksrc" DISTDIR="$pkgdir" install-kernel || return 1
 }