analysis-stats: respect --disable-proc-macros flag

Author: davidbarsky

src/tools/rust-analyzer/crates/rust-analyzer/src/cli/analysis_stats.rs

@@ -77,7 +77,11 @@ impl flags::AnalysisStats {
         let metadata_time = db_load_sw.elapsed();
         let load_cargo_config = LoadCargoConfig {
             load_out_dirs_from_check: !self.disable_build_scripts,
-            with_proc_macro_server: ProcMacroServerChoice::Sysroot,
+            with_proc_macro_server: if self.disable_proc_macros {
+                ProcMacroServerChoice::None
+            } else {
+                ProcMacroServerChoice::Sysroot
+            },
             prefill_caches: false,
         };