Update 'copts' documentation
Fixed
RELNOTES: None.
@@ -165,7 +165,8 @@ public class BazelCppRuleClasses {
<p>
Each string in this attribute is added in the given order to <code>COPTS</code> before
compiling the binary target. The flags take effect only for compiling this target, not
- its dependencies, so be careful about header files included elsewhere.
+ its dependencies, so be careful about header files included elsewhere. All paths should
+ be relative to the workspace, not to the current package.
</p>
<p>
If the package declares the <a href="${link package.features}">feature</a>
