llvm-project

fdd7cafb - [z/OS][SystemZ] Clang dependency files are text files (#121849)

[z/OS][SystemZ] Clang dependency files are text files (#121849) The dependency file and the P1689 file are text files, but the open call misses the OF_Text flag. This PR adds the flag. Fixes regressions in test cases ClangScanDeps/modules-extern-unrelated.m and ClangScanDeps/P1689.cppm.