This fixes the following error when starting nvvp or nsight:
```
(java:23876): Gtk-WARNING **: 19:12:17.777: Unable to locate theme engine in module_path: "adwaita",
A fatal error has been detected by the Java Runtime Environment:
SIGSEGV (0xb) at pc=0x00007f957f7b67fe, pid=23876, tid=140281059333888
JRE version: Java(TM) SE Runtime Environment (8.0_77-b03) (build 1.8.0_77-b03)
Java VM: Java HotSpot(TM) 64-Bit Server VM (25.77-b03 mixed mode linux-amd64 compressed oops)
Problematic frame:
C [libpixbufloader-bmp.so+0x27fe] gdk_pixbuf__bmp_image_load_increment+0xeee
```
Since GDK_PIXBUF_MODULE_FILE should match the version we actually link
to, we override the environment variable using the one provided by the
gdk_pixbuf setup-hook.
* pkgs: refactor needless quoting of homepage meta attribute
A lot of packages are needlessly quoting the homepage meta attribute
(about 1400, 22%), this commit refactors all of those instances.
* pkgs: Fixing some links that were wrongfully unquoted in the previous
commit
* Fixed some instances
* Add a "lib" output containing (for the moment) only libOpenCL. This
reduces the closure size of opensubdiv and blender by about 2 GiB.
* Add a "doc" output (about ~200 MiB).
* Remove the "sdk" output since it was worse than useless: all of the
"sdk" output was also included in "out", so it actually increased
disk space usage.
* Run patchelf on ELF binaries only.
- Set a cmake flag to allow cmake to find CUDA automatically.
- Pass -D_FORCE_INLINES to work around
/nix/store/8sl4jfs3nq0pkq4gg655s3axrxdx7z29-glibc-2.24-dev/include/string.h: In function 'void* __mempcpy_inline(void*, const void*, size_t)':
/nix/store/8sl4jfs3nq0pkq4gg655s3axrxdx7z29-glibc-2.24-dev/include/string.h:650:42: error: 'memcpy' was not declared in this scope
https://github.com/BVLC/caffe/issues/4046
This fixes OpenSubdiv and Blender.
