Compile failure on packages due to linking of 1.1 on 0.7

[evetion]

Encountered in compiling visr/GDAL.jl, partly due to #40

When using both 0.7 and 1.1 (common for backward compatability) and a package that is shared between those versions the generated deps.jl can include Julia *LIBRARY_PATHs other than the version in use.

Steps to reproduce:

• build GDAL on 0.7
• build GDAL on 1.1 (overwriting shared deps.jl)
• use GDAL on 0.7

leads to:

Error: Error building `GDAL`:
│ ERROR: could not load library "/Applications/Julia-0.7.app/Contents/Resources/julia/lib/julia/sys.dylib"
│ dlopen(/Applications/Julia-0.7.app/Contents/Resources/julia/lib/julia/sys.dylib, 6): Symbol not found: _jl_current_exception
│   Referenced from: /Applications/Julia-1.1.app/Contents/Resources/julia/lib/julia/sys.dylib
│   Expected in: /Applications/Julia-0.7.app/Contents/Resources/julia/bin/../lib/libjulia.dylib
│  in /Applications/Julia-1.1.app/Contents/Resources/julia/lib/julia/sys.dylib
└ @ Pkg.Operations /Users/osx/buildbot/slave/package_osx64/build/usr/share/julia/stdlib/v0.7/Pkg/src/Operations.jl:1068

[evetion]

@visr As the issue is within compiling that package, but I can imagine other packages will encounter the same issues.