ExtData2G is perma-SHARED

[mathomp4]

Recent tests by @climbfuji trying to run GEOS with a spack-stack...stack, found a bug in MAPL. Namely, unlike all the other libraries in MAPL which can be static or shared, e.g.:

MAPL/gridcomps/ExtData/CMakeLists.txt

Lines 9 to 10 in ed117a2

	esma_add_library (${this} SRCS ${srcs} DEPENDENCIES MAPL.shared MAPL.constants MAPL.base MAPL.generic MAPL.pfio
	MAPL.griddedio MAPL_cfio_r4 TYPE ${MAPL_LIBRARY_TYPE})

ExtData2G is locked into SHARED:

MAPL/gridcomps/ExtData2G/CMakeLists.txt

Line 26 in ed117a2

esma_add_library (${this} SRCS ${srcs} DEPENDENCIES MAPL.shared MAPL.base MAPL.generic MAPL.griddedio TYPE SHARED)