Be more specific about the minimum required version of readelf (ie. binutils),...

Be more specific about the minimum required version of readelf (ie. binutils), as it appears that this "patch" level version change resulted in a change of output, not the "minor" version.

binutils 2.38-4 in Debian uses "retq" but 2.38.50.20220615-4 uses "ret".

tests/comparators/test_elf.py

@@ -95,7 +95,7 @@ def test_obj_compare_non_existing(monkeypatch, obj1):
 
 
 @skip_unless_tools_exist("readelf")
-@skip_unless_tool_is_at_least("readelf", readelf_version, "2.38")
+@skip_unless_tool_is_at_least("readelf", readelf_version, "2.38.50")
 @skip_if_binutils_does_not_support_x86()
 def test_diff(obj_differences):
     assert len(obj_differences) == 1
@@ -131,7 +131,7 @@ def lib_differences(lib1, lib2):
 
 
 @skip_unless_tools_exist("readelf", "objdump")
-@skip_unless_tool_is_at_least("readelf", readelf_version, "2.38")
+@skip_unless_tool_is_at_least("readelf", readelf_version, "2.38.50")
 @skip_if_binutils_does_not_support_x86()
 def test_lib_differences(lib_differences):
     assert len(lib_differences) == 2
@@ -173,7 +173,7 @@ def libmix_differences(libmix1, libmix2):
 @skip_unless_tools_exist("xxd")
 @skip_unless_tools_exist("llvm-readobj", "llvm-objdump")
 @skip_unless_tools_exist("readelf", "objdump")
-@skip_unless_tool_is_at_least("readelf", readelf_version, "2.38")
+@skip_unless_tool_is_at_least("readelf", readelf_version, "2.38.50")
 @skip_if_binutils_does_not_support_x86()
 def test_libmix_differences(libmix_differences):
     assert len(libmix_differences) == 5