apr: modify another not detected flag in apr.h

srcpkgs/apr/template

@@ -1,7 +1,7 @@
 # Template file for 'apr'
 pkgname=apr
 version=1.7.0
-revision=2
+revision=3
 build_style=gnu-configure
 configure_args="--with-installbuilddir=/usr/share/apr-1/build"
 makedepends="expat-devel libuuid-devel"
@@ -39,6 +39,7 @@ pre_build() {
 		# Fixup some not detected configure results to match native builds
 		vsed -i include/apr.h \
 			-e "/#define APR_HAVE_SHMEM_MMAP_ZERO/s;0;1;" \
+			-e "/#define APR_HAVE_IOVEC/s;0;1;" \
 			-e "/#define APR_HAS_POSIXSEM_SERIALIZE/s;0;1;" \
 			-e "/#define APR_HAS_PROC_PTHREAD_SERIALIZE/s;0;1;"
 	fi