mass rewrite of find parameters to cross-platform style

Fixes #9044, close #9667. Thanks to @taku0 for suggesting this solution.
Now we have no modes starting with `/` or `+`.

Rewrite the `-perm` parameters of find:
 - completely safe: rewrite `/0100` and `+100` to `-0100`,
 - slightly semantics-changing: rewrite `+111` to `-0100`.
I cross-verified the `find` manual pages for Linux, Darwin, FreeBSD.

pkgs/development/compilers/oraclejdk/dlj-bundle-builder.sh

@@ -45,7 +45,7 @@ fi
 rpath=$rpath${rpath:+:}$jrePath/lib/$architecture/jli
 
 # set all the dynamic linkers
-find $out -type f -perm +100 \
+find $out -type f -perm -0100 \
     -exec patchelf --interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
     --set-rpath "$rpath" {} \;
 

pkgs/development/compilers/oraclejdk/jdk-linux-base.nix

@@ -142,7 +142,7 @@ let result = stdenv.mkDerivation rec {
     rpath=$rpath''${rpath:+:}$jrePath/lib/${architecture}
 
     # set all the dynamic linkers
-    find $out -type f -perm +100 \
+    find $out -type f -perm -0100 \
         -exec patchelf --interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
         --set-rpath "$rpath" {} \;