main/postmarketos-mkinitfs: add sync before exit (MR 1850)

[ci:skip-vercheck]

main/postmarketos-mkinitfs/APKBUILD

 # Maintainer: Oliver Smith <ollieparanoid@postmarketos.org>
 pkgname=postmarketos-mkinitfs
 pkgver=0.23
-pkgrel=0
+pkgrel=1
 pkgdesc="Tool to generate initramfs images for postmarketOS"
 url="https://postmarketos.org"
 depends="
@@ -57,6 +57,6 @@ check() {
 sha512sums="4717bf24bd13fd4d90f3ab000ab43f7d61529515de224ebc86458ae709ebe0b5065655457e34f5952126bac6ab45143a91cddb09a8ad2d0a55c5cecd564a0135  00-default.modules
 bafd06286594102b8b3b126c3ae0a77a97f004ab804f03426154310c5107a1acaf3636bdba92626333adfe4fb0df32ff42c6d8d9e7adf35f6da620c6e14407a1  init.sh.in
 c625759e0a3fcfcb00d22e7240edec51df92ebb33a8c0bf2bcb8df549a9dfbab1bd786972c6678c49e9be0d87c56ef4fe42171d2e0b6be8b169e4cfbb7085d65  init_functions.sh
-dfc01ee0547ea88b7aa45a005e842b636e9e19bbf1705f3dad53a66d57af7c5c513c092b5469a06d9b00322e56a4d25f1b47e4c5324aafa99f5291679968d1f1  mkinitfs.sh
+4f74995c52b3fd18ef77347dbbca4b3575d23fd339b62a257c1c4b45a16feb5a95f391d6189f62e94ac00d8da3077d192c678554a5f9b8190e34bf3fa6c86e95  mkinitfs.sh
 ee1af97c53d53229eead55a580fad704891c0dd7b678dd3d56822c5a6d9e983559cf8a271abe4f5c144116e5ba507c182aa02a478e3db82d1b689facc0ac6d6b  mkinitfs_functions.sh
 c7a3c33daeb12b33ac72207191941c4d634f15c22958273b52af381a70ebaba1d3a9299483f0c447d9e66c560151fe7b9588bb4bbef2c8914f83185984ee4622  mkinitfs_test.sh"

main/postmarketos-mkinitfs/mkinitfs.sh

@@ -39,4 +39,5 @@ rm -rf "$tmpdir"
 
 generate_initramfs_extra "$outfile_extra"
 
+sync
 exit 0