firefox: Update version from 74.0.1 to 75.0

https://www.mozilla.org/en-US/firefox/75.0/releasenotes/

`--disable-system-sqlite` has been removed, as Firefox now always ships
their own copy (unfortunately).

firefox.be0

@@ -2,7 +2,7 @@
 
 #export BEE_TMP_TMPDIR=/dev/shm BEE_TMP_BUILDROOT=/dev/shm/bee-root BEE_MAKEFLAGS='-j80'
 
-# BEE_VERSION firefox-74.0.1-0
+# BEE_VERSION firefox-75.0-0
 
 #https://ftp.mozilla.org/pub/firefox/releases/$pkgversion/SOURCE to find the right download link
 SRCURL[0]="https://ftp.mozilla.org/pub/firefox/releases/${PKGVERSION}/source/firefox-${PKGVERSION}.source.tar.xz"
@@ -19,7 +19,6 @@ mee_configure() {
 	ac_add_options --enable-application=browser
 	ac_add_options --disable-necko-wifi
 	ac_add_options --enable-official-branding
-	ac_add_options --disable-system-sqlite
 	ac_add_options --enable-system-pixman
 	ac_add_options --with-system-bz2
 	ac_add_options --without-system-icu