cross/busybox-static-*: upgrade to 1.31.1-r21

cross/busybox-static-aarch64/APKBUILD

@@ -3,7 +3,7 @@
 
 pkgname=busybox-static-aarch64
 pkgver=1.31.1
-pkgrel=20
+pkgrel=21
 
 _arch="aarch64"
 _mirror="http://dl-cdn.alpinelinux.org/alpine/"
@@ -26,4 +26,4 @@ package() {
     rm .PKGINFO .SIGN.*
 }
 
-sha512sums="1a2b66745a7a03bd1c1834e2d994706c3ab33df4ca0a374fa5eb0fb2af611651d798bba5cc4779034634ccc257130fc55326236dae3d8b6261760799be948720  busybox-static-1.31.1-r20-aarch64.apk"
+sha512sums="9b298f4393abfeacab93828d3afd789eeab4f45245781970e167ce83897c9ff3ede47e2327cfacb26d14c6966615f68b7f12603a206c23d02eb5c13c6aed6667  busybox-static-1.31.1-r21-aarch64.apk"

cross/busybox-static-armhf/APKBUILD

@@ -3,7 +3,7 @@
 
 pkgname=busybox-static-armhf
 pkgver=1.31.1
-pkgrel=20
+pkgrel=21
 
 _arch="armhf"
 _mirror="http://dl-cdn.alpinelinux.org/alpine/"
@@ -26,4 +26,4 @@ package() {
     rm .PKGINFO .SIGN.*
 }
 
-sha512sums="73a214e30b303a413f6df38435847b54763e11d45478ae3105266c08241d9ac1c863790436399cbaf7041e8423188db50bb61068a7906dadfee678013babcdcc  busybox-static-1.31.1-r20-armhf.apk"
+sha512sums="f6e47ed398112d2e2d33a297d8f8a711ead5c7a10a5e6acf89b38b9d0ef51a51a5adffb5f08237754fd733eccf7df7c387d4435ca6b78806dbbb79ff3add5066  busybox-static-1.31.1-r21-armhf.apk"

cross/busybox-static-armv7/APKBUILD

@@ -3,7 +3,7 @@
 
 pkgname=busybox-static-armv7
 pkgver=1.31.1
-pkgrel=20
+pkgrel=21
 
 _arch="armv7"
 _mirror="http://dl-cdn.alpinelinux.org/alpine/"
@@ -26,4 +26,4 @@ package() {
     rm .PKGINFO .SIGN.*
 }
 
-sha512sums="1761ac1336fa9579d9ae9a335d585483f35610c71f12c56c4c30a164830fec0c703e680aa5ae5323e0ca3424ba5746665a5ebcd68916421449e8a9f8e76bcd67  busybox-static-1.31.1-r20-armv7.apk"
+sha512sums="2e592ffaee459fb07f84d36bca4d031c5c3d2e884d4dcf7d1429fc988dbc1b0a0ad79d80a302354aa5567ba4a52d5126264ae822880b08be21e45c3152ad1c4d  busybox-static-1.31.1-r21-armv7.apk"