postmarketos-ui-fbkeyboard: fix energy waste (MR 5001)

Turn off blinking cursor as on e-ink screens this wastes energy.

[ci:skip-build]: already built successfully in CI

main/postmarketos-ui-fbkeyboard/APKBUILD

@@ -1,8 +1,8 @@
 # Reference: https://postmarketos.org/uipkg
 # Maintainer: Ferenc Bakonyi <bakonyi.ferenc@gmail.com>
 pkgname=postmarketos-ui-fbkeyboard
-pkgver=2
-pkgrel=1
+pkgver=3
+pkgrel=0
 pkgdesc="Plain framebuffer console with touchscreen keyboard support"
 url="https://github.com/bakonyiferenc/fbkeyboard"
 arch="all"
@@ -22,5 +22,5 @@ package() {
 }
 
 sha512sums="
-db617546a5d8de1307e3b45bd3dbf07b62f0b6f2cb25b486dd0c46533d21af0cd6e7c97ade3074f57d982922ad148344909096803df9faa56be00b348c53c8c5  fbkeyboard.init
+bed2c48abfac7cc9bc16fb16cd3ae3a7048121d2867b961458f0d3a9520e16598c8115a7b00808bded64904956aea445fa31a3106c52bab87cfba3420be309b8  fbkeyboard.init
 "

main/postmarketos-ui-fbkeyboard/fbkeyboard.init

@@ -21,4 +21,6 @@ start_pre()
 				"the fbkeyboard service or built in."
 		fi
 	fi
+	# save energy
+	echo 0 >/sys/class/graphics/fbcon/cursor_blink
 }