Fix a couple of failures showing up in docker image

Presumably these failures are due to slightly different flags being
passed to the linkers by the version of clang in the docker image.

linker-diff/src/lib.rs

@@ -118,13 +118,17 @@ impl Config {
                 // We set this to 8. GNU ld sometimes does too, but sometimes to 0.
                 "section.got.entsize",
                 "section.plt.got.entsize",
+                // GNU ld sometimes sets this differently that we do.
+                "section.plt.alignment",
                 // We currently output version info when linking against the interpreter
                 // (ld-linux-x86-64.so.2). GNU ld doesn't.
                 ".dynamic.DT_VERNEEDNUM",
                 // We currently handle these dynamic tags differently
                 ".dynamic.DT_JMPREL",
                 ".dynamic.DT_PLTGOT",
                 ".dynamic.DT_PLTREL",
+                // We don't yet write this.
+                ".dynamic.DT_HASH",
                 // We do support this. TODO: Should definitely look into why we're seeing this missing
                 // in our output.
                 "section.rela.plt",