fix(trim-paths): merge trim-paths from different profiles

In 4d29af1 we forgot to add trim-paths to `fn merge()`.
This commit follows how `-Zprofile-rustflags` works ---
overriding instead of merging array.

Author: weihanglo

src/cargo/util/toml/mod.rs

@@ -3007,6 +3007,10 @@ impl TomlProfile {
         if let Some(v) = &profile.strip {
             self.strip = Some(v.clone());
         }
+
+        if let Some(v) = &profile.trim_paths {
+            self.trim_paths = Some(v.clone())
+        }
     }
 }
 

tests/testsuite/profile_trim_paths.rs

@@ -192,7 +192,7 @@ fn profile_merge_works() {
             "\
 [COMPILING] foo v0.0.1 ([CWD])
 [RUNNING] `rustc [..]\
-    -Zremap-path-scope=macro \
+    -Zremap-path-scope=diagnostics \
     --remap-path-prefix=[..]/lib/rustlib/src/rust=/rustc/[..] \
     --remap-path-prefix=[CWD]= [..]
 [FINISHED] custom [..]",