analyzer: use analyzer/common.h as a common header

Our headers are a major pain to work with: many require certain other
headers to be included in a particular (undocumented) order in order
to be includable.

Simplify includes in the analyzer by renaming analyzer/analyzer.h to
analyzer/common.h and have it include all the common headers needed
throughout the analyzer, thus encapsulating the rules about e.g. being
able to include "gimple.h" in one place in the analyzer subdirectory.

Doing so also makes it easier to e.g. define INCLUDE_SET in one place,
rather than in many source files.

gcc/analyzer/ChangeLog:
	* analyzer.h: Rename to...
	* common.h: ...this.  Add define of INCLUDE_VECTOR, includes of
	"config.h", "system.h", "coretypes.h", "make-unique.h", "tree.h",
	"function.h", "basic-block.h", "gimple.h", "options.h",
	"bitmap.h", "diagnostic-core.h", and "diagnostic-path.h".
	* access-diagram.h: Don't include "analyzer/analyzer.h".
	* access-diagram.cc: Reorganize includes to #include
	"analyzer/common.h" first, then group by subsystem, dropping
	redundant headers.
	* analysis-plan.cc: Likewise.
	* analyzer-language.cc: Likewise.
	* analyzer-pass.cc: Likewise.
	* analyzer-selftests.cc: Likewise.
	* analyzer.cc: Likewise.
	* bounds-checking.cc: Likewise.
	* call-details.cc: Likewise.
	* call-info.cc: Likewise.
	* call-string.cc: Likewise.
	* call-summary.cc: Likewise.
	* checker-event.cc: Likewise.
	* checker-path.cc: Likewise.
	* complexity.cc: Likewise.
	* constraint-manager.cc: Likewise.
	* diagnostic-manager.cc: Likewise.
	* engine.cc: Likewise.
	* feasible-graph.cc: Likewise.
	* infinite-loop.cc: Likewise.
	* infinite-recursion.cc: Likewise.
	* kf-analyzer.cc: Likewise.
	* kf-lang-cp.cc: Likewise.
	* kf.cc: Likewise.
	* known-function-manager.cc: Likewise.
	* pending-diagnostic.cc: Likewise.
	* program-point.cc: Likewise.
	* program-state.cc: Likewise.
	* ranges.cc: Likewise.
	* record-layout.cc: Likewise.
	* region-model-asm.cc: Likewise.
	* region-model-manager.cc: Likewise.
	* region-model-reachability.cc: Likewise.
	* region-model.cc: Likewise.
	* region.cc: Likewise.
	* sm-fd.cc: Likewise.
	* sm-file.cc: Likewise.
	* sm-malloc.cc: Likewise.
	* sm-pattern-test.cc: Likewise.
	* sm-sensitive.cc: Likewise.
	* sm-signal.cc: Likewise.
	* sm-taint.cc: Likewise.
	* sm.cc: Likewise.
	* state-purge.cc: Likewise.
	* store.cc: Likewise.
	* supergraph.cc: Likewise.
	* svalue.cc: Likewise.
	* symbol.cc: Likewise.
	* trimmed-graph.cc: Likewise.
	* varargs.cc: Likewise.

gcc/testsuite/ChangeLog:
	* gcc.dg/plugin/analyzer_cpython_plugin.cc: Update for renaming
	of analyzer/analyzer.h to analyzer/common.h.
	* gcc.dg/plugin/analyzer_gil_plugin.cc: Likewise.
	* gcc.dg/plugin/analyzer_kernel_plugin.cc: Likewise.
	* gcc.dg/plugin/analyzer_known_fns_plugin.cc: Likewise.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

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