Add SQLITE_API qualifiers to public API functions in header file sqlite3rbu.h.

FossilOrigin-Name: e11e6eb1d98518ba3f0361efa1c274084c5d6325b52e8470b6873e14e00c4eff

diff --cc manifest
index 7c79e33eb9082e34f69e24f0b832398f65d0a8e3,36a4db4d01a2aa0441f6b268e3eb5e7523358194..c554c40f90b01f7291237030d78d15619622ef9a
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\ssome\sproblems\sin\sRBU\stest\scases.\sAlso\supdate\sRBU\ssource\scode\sto\sbetter\nhandle\sthe\strivial\scase\swhere\san\sRBU\supdate\sis\sapplied\sto\sa\sdatabase\szero\npages\sin\ssize.
- D 2017-08-03T15:43:55.425
 -C Update\sscript\stool/mksqlite3c.tcl\sto\savoid\sduplicating\sthe\sSQLITE_API\nqualifier\swhen\scopying\ssqlite3rbu.h\sinto\sthe\samalgamation.
 -D 2017-08-04T08:23:33.554
++C Add\sSQLITE_API\squalifiers\sto\spublic\sAPI\sfunctions\sin\sheader\sfile\ssqlite3rbu.h.
++D 2017-08-04T08:24:52.091
  F Makefile.in d9873c9925917cca9990ee24be17eb9613a668012c85a343aef7e5536ae266e8
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc 02b469e9dcd5b7ee63fc1fb05babc174260ee4cfa4e0ef2e48c3c6801567a016
@@@ -1640,7 -1640,7 +1640,8 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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+ R 1da166520412d11ef7376fec28bc102c
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  U dan
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++Z 4e8e60f50eb244bbe132eaa0a5412a20

diff --cc manifest.uuid
index 89c81c9e188052e1be7b1bd620792c5fad6419dc,d2bafa66c596ccaa036553251e7234049470bef2..c8babb7baf3030a5fd2560e428fd201e170ade59
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 7676b39bc120ae23da0c6a14452eb99a58901ee45c3d43b8beae426f9e4dc0c3
 -61ab112f326a51d2d524a6371d8c93851ca2c6917414a802ac72d7cf5a2413fb
++e11e6eb1d98518ba3f0361efa1c274084c5d6325b52e8470b6873e14e00c4eff