configure.ac: Use new helper function for LLVM

Use the new helper function to add LLVM targets and components.
The components are added one by one to later find out which component
is missing in case there is one.

Signed-off-by: Tobias Droste <tdroste@gmx.de>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
[Emil Velikov: s/ipos/ipo/, drop "yes" argument from llvm_add_component]
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
1 file changed