Description of problem:

Installation of the Ipopt-devel package adds a pkg-config file specifying incorrect include directores, i.e.

$ pkg-config --cflags ipopt
-I/usr/include/coin-or 

However, the headers are installed into /usr/include/coin/ and no /usr/include/coin-or even exists.




Version-Release number of selected component (if applicable):
I am using version 3.13.0-1.fc32




How reproducible:
Every time

Steps to Reproduce:
1. Install the coin-or-Ipopt-devel package
2. Run `pkg-config --cflags ipopt` and observe output is not a directory on the machine
3. Attempt to compile any IPOPT program

Actual results:
Program will fail to compile as the headers are in /usr/include/coin/ not /usr/include/coin-or/

Expected results:
Successful compilation

Additional info:
Extracting the rpm package locally yields the file tree:

usr
├── include
│   └── coin
│       ├── many.hpp
│       ├── many.h
│       ├── headers.h
│       ├── ...
└── lib64
    ├── libipoptamplinterface.so -> libipoptamplinterface.so.3.13.0
    ├── libipopt.so -> libipopt.so.3.13.0
    ├── libsipopt.so -> libsipopt.so.3.13.0
    └── pkgconfig
        ├── ipoptamplinterface.pc
        └── ipopt.pc

And looking into the `ipopt.pc` file, we see

prefix=/usr
exec_prefix=/usr
libdir=/usr/lib64
includedir=/usr/include/coin-or

Name: IPOPT
Description: Interior Point Optimizer
URL: https://github.com/coin-or/Ipopt
Version: 3.13.0
Libs: -L${libdir} -lipopt
Libs.private: -ldmumps -lopenblas -lm  -ldl
Cflags: -I${includedir}
Requires:
Requires.private: 

Which clearly points to incorrect directory.