Update docs to note assembly source files are allowed in objc_library.srcs
Fixes
RELNOTES: None.
@@ -420,7 +420,8 @@ public class ObjcRuleClasses {
return builder
/* <!-- #BLAZE_RULE($objc_compiling_rule).ATTRIBUTE(srcs) -->
The list of C, C++, Objective-C, and Objective-C++ source and header
- files that are processed to create the library target.
+ files, and/or (`.s`, `.S`, or `.asm`) assembly source files, that are processed to create
+ the library target.
These are your checked-in files, plus any generated files.
Source files are compiled into .o files with Clang. Header files
may be included/imported by any source or header in the srcs attribute
