[clang][ClangScanDeps][test] Remove the file before overwriting it

Remove the file copied from the source tree before overwriting it. If
the source code is stored with readonly (0444) permissions, then
the copied files are also readonly and attempting to overwrite them
fails.

diff --git a/clang/test/ClangScanDeps/modules-pch.c b/clang/test/ClangScanDeps/modules-pch.c
index aa568e5..0f61dd5 100644 (file)
--- a/clang/test/ClangScanDeps/modules-pch.c
+++ b/clang/test/ClangScanDeps/modules-pch.c
@@ -7,6 +7,7 @@
 
 // Scan dependencies of the PCH:
 //
+// RUN: rm -f %t/cdb_pch.json
 // RUN: sed "s|DIR|%/t|g" %S/Inputs/modules-pch/cdb_pch.json > %t/cdb_pch.json
 // RUN: clang-scan-deps -compilation-database %t/cdb_pch.json -format experimental-full \
 // RUN:   -module-files-dir %t/build > %t/result_pch.json
@@ -94,6 +95,7 @@
 
 // Scan dependencies of the TU:
 //
+// RUN: rm -f %t/cdb_tu.json
 // RUN: sed "s|DIR|%/t|g" %S/Inputs/modules-pch/cdb_tu.json > %t/cdb_tu.json
 // RUN: clang-scan-deps -compilation-database %t/cdb_tu.json -format experimental-full \
 // RUN:   -module-files-dir %t/build > %t/result_tu.json
@@ -142,6 +144,7 @@
 
 // Scan dependencies of the TU that has common modules with the PCH:
 //
+// RUN: rm -f %t/cdb_tu_with_common.json
 // RUN: sed "s|DIR|%/t|g" %S/Inputs/modules-pch/cdb_tu_with_common.json > %t/cdb_tu_with_common.json
 // RUN: clang-scan-deps -compilation-database %t/cdb_tu_with_common.json -format experimental-full \
 // RUN:   -module-files-dir %t/build > %t/result_tu_with_common.json