[Patch] omp_lib.f90.in: Deprecate omp_lock_hint_* for OpenMP 5.0

[Tobias Burnus <tobias@codesourcery.com>]

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I noticed that we only tagged half of the 5.0 deprecations in the omp_lib module;
this added the other half. (omp_lock_hint_* was renamed to omp_sync_hint_*.)

Currently, this patch has has no visible effect - but once we bump the OpenMP version
from 4.5 to 5.0, there will warnings of the those.

Comments, remarks? If not, I will commit the attached patch tomorrow.

Tobias

PS: Once the OpenMP version has been bumped (as done for testing), the warning
looks as follows:

     1 | use omp_lib
       |    1
Warning: Using parameter ‘omp_lock_hint_kind’ declared at (1) is deprecated [-Wdeprecated-declarations]

     3 | print *, omp_get_nested()
       |        1
Warning: Using function ‘omp_get_nested’ at (1) is deprecated [-Wdeprecated-declarations]

The 'omp_lock_hint_kind' warning is not ideal as it uses the declared-at location
and not the first-used location, which would be in line 2:

integer(omp_lock_hint_kind) :: hint
-----------------
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omp_lib.f90.in: Deprecate omp_lock_hint_* for OpenMP 5.0

The omp_lock_hint_* parameters were deprecated in favor of
omp_sync_hint_*.  While omp.h contained deprecation markers for those,
the omp_lib module only contained them for omp_{g,s}_nested.

Note: The -Wdeprecated-declarations warning will only become active once
openmp_version / _OPENMP is bumped from 201511 (4.5) to 201811 (5.0).

libgomp/ChangeLog:

	* omp_lib.f90.in: Tag omp_lock_hint_* as being deprecated when
	_OPENMP >= 201811.

diff --git a/libgomp/omp_lib.f90.in b/libgomp/omp_lib.f90.in
index e4515271252..755c0bf16ec 100644
--- a/libgomp/omp_lib.f90.in
+++ b/libgomp/omp_lib.f90.in
@@ -904,6 +904,10 @@
 
 #if _OPENMP >= 201811
 !GCC$ ATTRIBUTES DEPRECATED :: omp_get_nested, omp_set_nested
+!GCC$ ATTRIBUTES DEPRECATED :: omp_lock_hint_kind, omp_lock_hint_none
+!GCC$ ATTRIBUTES DEPRECATED :: omp_lock_hint_uncontended, omp_lock_hint_contended
+!GCC$ ATTRIBUTES DEPRECATED :: omp_lock_hint_nonspeculative
+!GCC$ ATTRIBUTES DEPRECATED :: omp_lock_hint_speculative
 #endif
 
 #if _OPENMP >= 202011