benchmarks/vkoverhead: mark BROKEN on armv7

../src/vkoverhead.c:859:18: error: incompatible pointer to integer conversion
initializing 'VkPipeline' (aka 'unsigned long long') with an expression of type
'void *' [-Werror,-Wint-conversion]
      VkPipeline pipeline = he->data;
                 ^          ~~~~~~~~
../src/vkoverhead.c:3084:63: error: incompatible integer to pointer conversion
passing 'VkPipeline' (aka 'unsigned long long') to parameter of type 'void *'
[-Werror,-Wint-conversion]
            _mesa_hash_table_insert(&gpl_pipeline_table, key,
pipeline_gpl_vert_final[i]);
                                                             
^~~~~~~~~~~~~~~~~~~~~~~~~~
../util/hash_table.h:92:71: note: passing argument to parameter 'data' here
_mesa_hash_table_insert(struct hash_table *ht, const void *key, void *data);
                                                                      ^

Reported by:	pkg-fallout

benchmarks/vkoverhead: drop unused dependency

benchmarks/vkoverhead: add new port

vkoverhead is a tool for evaluating CPU-based overhead of Vulkan
drivers. It was inspired heavily by drawoverhead from piglit.

 ## Features
* extreme granularity for profiling specific scenarios
* simple to use
* CSV output for ease of script parsing
* zero dependencies

https://github.com/zmike/vkoverhead