Re-enable some coverage tests on Linux

Author: Zalathar

tests/run-coverage/uses_crate.coverage

@@ -148,8 +148,8 @@ $DIR/auxiliary/used_crate.rs:
   100|       |// `unused_generic_function<T>()`, below.
 
 $DIR/uses_crate.rs:
-    1|       |// FIXME #110395
-    2|       |// ignore-linux
+    1|       |// This test was failing on Linux for a while due to #110393 somehow making
+    2|       |// the unused functions not instrumented, but it seems to be fine now.
     3|       |
     4|       |// Validates coverage now works with optimizations
     5|       |// compile-flags: -C opt-level=3

tests/run-coverage/uses_crate.rs

@@ -1,5 +1,5 @@
-// FIXME #110395
-// ignore-linux
+// This test was failing on Linux for a while due to #110393 somehow making
+// the unused functions not instrumented, but it seems to be fine now.
 
 // Validates coverage now works with optimizations
 // compile-flags: -C opt-level=3

tests/run-coverage/uses_inline_crate.coverage

@@ -139,8 +139,8 @@ $DIR/auxiliary/used_inline_crate.rs:
    90|      2|}
 
 $DIR/uses_inline_crate.rs:
-    1|       |// FIXME #110395
-    2|       |// ignore-linux
+    1|       |// This test was failing on Linux for a while due to #110393 somehow making
+    2|       |// the unused functions not instrumented, but it seems to be fine now.
     3|       |
     4|       |// Validates coverage now works with optimizations
     5|       |// compile-flags: -C opt-level=3

tests/run-coverage/uses_inline_crate.rs

@@ -1,5 +1,5 @@
-// FIXME #110395
-// ignore-linux
+// This test was failing on Linux for a while due to #110393 somehow making
+// the unused functions not instrumented, but it seems to be fine now.
 
 // Validates coverage now works with optimizations
 // compile-flags: -C opt-level=3