Allow WITHOUT ROWID virtual tables to be writable as long as they have

exactly one column as their PRIMARY KEY.

FossilOrigin-Name: c601d128ff1f1dd6d221ee9f55595a95b58ba07d043e1d530743ea913731560e

diff --cc manifest
index 17ea787547b93370e961bd4c1ab98453dcd972bd,9e38ba600d57c6ee6dc0283ed276c151855a4f38..2454af9dca4c8da460258f45df6acd2dcf804656
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Add\sthe\s"instance"\stype\sto\sthe\sfts5vocab\svirtual\stable\smodule.\sFor\sdirect\naccess\sto\sthe\scontents\sof\sthe\sfts5\sterm\sindex.
- D 2017-08-10T20:36:56.419
 -C Fix\sa\stypo\sin\scsv01.test\sintroduced\sby\sthe\sprevious\scommit.
 -D 2017-08-10T19:12:04.643
++C Allow\sWITHOUT\sROWID\svirtual\stables\sto\sbe\swritable\sas\slong\sas\sthey\shave\nexactly\sone\scolumn\sas\stheir\sPRIMARY\sKEY.
++D 2017-08-10T20:43:07.509
  F Makefile.in d9873c9925917cca9990ee24be17eb9613a668012c85a343aef7e5536ae266e8
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc 02b469e9dcd5b7ee63fc1fb05babc174260ee4cfa4e0ef2e48c3c6801567a016
@@@ -1645,7 -1646,7 +1646,8 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P e49279e65169a939b6058a0960dc1fe09ce4ee2d78992a1969773cbc7ce1043b
- R 51c4219f1ac2413928699169835fef62
 -P b0e3b88a792623f7761586d8bfac058ddf939f49944ff0c4376627ff920895db
 -R f6522b1ac79c489b723c146b9fd586f4
--U dan
- Z c67de475a6759cd5bb3ba77ac9b27176
 -Z 105e790a02c4f620d8e963aaaf4e7ac3
++P 34a7bd7121a478e14982d59be95ad891fab8050ad5e006638f826c57c392b93e f38ff718278c8ff477d1c6379ced32167063de15f0666c8eac2e4dd30cbd975c
++R 2bbcd61e6b49ae99642d400578e0c457
++T +closed f38ff718278c8ff477d1c6379ced32167063de15f0666c8eac2e4dd30cbd975c
++U drh
++Z 8e6962897e49436cc593ee413e7d03cc

diff --cc manifest.uuid
index 6de194638d96ad6ea3f85674b4c24a9bd3394c14,c4467b8860db64ade4474c231228d89ba2fc8574..91bf4d1ce27df9ca2163f7c6add8689278275934
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 34a7bd7121a478e14982d59be95ad891fab8050ad5e006638f826c57c392b93e
 -f38ff718278c8ff477d1c6379ced32167063de15f0666c8eac2e4dd30cbd975c
++c601d128ff1f1dd6d221ee9f55595a95b58ba07d043e1d530743ea913731560e