Add preset buildbot_linux_crosscompile_android,tools=RA,stdlib=RD,build,x86_64

Author: marcprux

utils/build-presets.ini

@@ -1022,6 +1022,11 @@ mixin-preset=buildbot_linux_crosscompile_android,tools=RA,stdlib=RD,build
 
 android-arch=aarch64
 
+[preset: buildbot_linux_crosscompile_android,tools=RA,stdlib=RD,build,x86_64]
+mixin-preset=buildbot_linux_crosscompile_android,tools=RA,stdlib=RD,build
+
+android-arch=x86_64
+
 # Ubuntu 18.04 preset for backwards compat and future customizations.
 [preset: buildbot_linux_1804]
 mixin-preset=buildbot_linux