Bug#1118511: rocm-llvm ftbfs on arm64 and ppc64el

[Matthias Klose <doko@debian.org>]

Package: src:rocm-llvm
Version: 7.0.1+dfsg-1
Severity: important
Tags: sid forky ftbfs

rocm-llvm ftbfs on arm64 and ppc64el, although the packaging suggests 
it's buildable on these architectures:

[...]
In file included from 
/build/reproducible-path/rocm-llvm-7.0.1+dfsg/amd/comgr/src/comgr-device-libs.cpp:64:
/build/reproducible-path/rocm-llvm-7.0.1+dfsg/build.comgr/include/libraries_sha.inc:1:44: 
error: narrowing conversion of ‘-6’ from ‘int’ to ‘char’ [-Wnarrowing]
    1 | static const char DEVICE_LIBS_ID[] = {105, -6, 72, -96, 110, 
-25, -17, 5, 34, -8, 25, 10, -88, -60, -22, 36, -29, 72, -71, 58, -41, 
-40, 47, -123, 17, 101, 119, -47, -35, -55, 60, -40, 0};
      |                                            ^~
/build/reproducible-path/rocm-llvm-7.0.1+dfsg/build.comgr/include/libraries_sha.inc:1:52: 
error: narrowing conversion of ‘-96’ from ‘int’ to ‘char’ [-Wnarrowing]
    1 | static const char DEVICE_LIBS_ID[] = {105, -6, 72, -96, 110, 
-25, -17, 5, 34, -8, 25, 10, -88, -60, -22, 36, -29, 72, -71, 58, -41, 
-40, 47, -123, 17, 101, 119, -47, -35, -55, 60, -40, 0};
      |                                                    ^~~