Add KPP configure option to search for alternative version of libfl

[jordanschnell]

Some systems have a different name for libfl (e.g., Derecho) - libfl.a vs. libfl.so. This adds a flag to check.

TYPE: enhancement

KEYWORDS: chem, KPP, configure_kpp, Derecho

SOURCE: internal

DESCRIPTION OF CHANGES: Problem: KPP would not compile on Derecho due to name differences in libfl: only libfl.so exists, not libfl.a.

Solution: Add flag to search for alternative name, libfl.so.

LIST OF MODIFIED FILES:

M chem/KPP/configure_kpp

TESTS CONDUCTED:

• Compiles with old intel compilers with libfl.a and compiles on Derecho with libfl.so
• It passes regression tests.

RELEASE NOTE: KPP configure option for alternative libfl name, libfl.so, in addition to libfl.a.

[weiwangncar]

The regression test results:

Test Type              | Expected  | Received |  Failed
= = = = = = = = = = = = = = = = = = = = = = = =  = = = =
Number of Tests        : 23           24
Number of Builds       : 60           57
Number of Simulations  : 158           150        0
Number of Comparisons  : 95           86        0

Failed Simulations are: 
None
Which comparisons are not bit-for-bit: 
None

[weiwangncar]

@islas @mgduda Can one of you review this PR? Thanks!