meson: rename included C source files to .c.inc

With Makefiles that have automatically generated dependencies, you
generated includes are set as dependencies of the Makefile, so that they
are built before everything else and they are available when first
building the .c files.

Alternatively you can use a fine-grained dependency, e.g.

        target/arm/translate.o: target/arm/decode-neon-shared.inc.c

With Meson you have only one choice and it is a third option, namely
"build at the beginning of the corresponding target"; the way you
express it is to list the includes in the sources of that target.

The problem is that Meson decides if something is a source vs. a
generated include by looking at the extension: '.c', '.cc', '.m', '.C'
are sources, while everything else is considered an include---including
'.inc.c'.

Use '.c.inc' to avoid this, as it is consistent with our other convention
of using '.rst.inc' for included reStructuredText files.  The editorconfig
file is adjusted.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

target/ppc/int_helper.c

@@ -398,7 +398,7 @@ target_ulong helper_divso(CPUPPCState *env, target_ulong arg1,
 target_ulong helper_602_mfrom(target_ulong arg)
 {
     if (likely(arg < 602)) {
-#include "mfrom_table.inc.c"
+#include "mfrom_table.c.inc"
         return mfrom_ROM_table[arg];
     } else {
         return 0;

target/ppc/translate.c

@@ -6900,15 +6900,15 @@ static inline void set_avr64(int regno, TCGv_i64 src, bool high)
     tcg_gen_st_i64(src, cpu_env, avr64_offset(regno, high));
 }
 
-#include "translate/fp-impl.inc.c"
+#include "translate/fp-impl.c.inc"
 
-#include "translate/vmx-impl.inc.c"
+#include "translate/vmx-impl.c.inc"
 
-#include "translate/vsx-impl.inc.c"
+#include "translate/vsx-impl.c.inc"
 
-#include "translate/dfp-impl.inc.c"
+#include "translate/dfp-impl.c.inc"
 
-#include "translate/spe-impl.inc.c"
+#include "translate/spe-impl.c.inc"
 
 /* Handles lfdp, lxsd, lxssp */
 static void gen_dform39(DisasContext *ctx)
@@ -7587,19 +7587,19 @@ GEN_HANDLER2_E(treclaim, "treclaim", 0x1F, 0x0E, 0x1D, 0x03E0F800, \
 GEN_HANDLER2_E(trechkpt, "trechkpt", 0x1F, 0x0E, 0x1F, 0x03FFF800, \
                PPC_NONE, PPC2_TM),
 
-#include "translate/fp-ops.inc.c"
+#include "translate/fp-ops.c.inc"
 
-#include "translate/vmx-ops.inc.c"
+#include "translate/vmx-ops.c.inc"
 
-#include "translate/vsx-ops.inc.c"
+#include "translate/vsx-ops.c.inc"
 
-#include "translate/dfp-ops.inc.c"
+#include "translate/dfp-ops.c.inc"
 
-#include "translate/spe-ops.inc.c"
+#include "translate/spe-ops.c.inc"
 };
 
 #include "helper_regs.h"
-#include "translate_init.inc.c"
+#include "translate_init.c.inc"
 
 /*****************************************************************************/
 /* Misc PowerPC helpers */