PHPC-755 replace mongoc-trace with mongoc

[puppyofkosh]

https://jira.mongodb.org/browse/PHPC-755

[bjori]

This is failing on travis:
https://travis-ci.org/mongodb/mongo-php-driver/jobs/147318803#L1239

/home/travis/build/mongodb/mongo-php-driver/php_phongo.c:1189:2: error: ‘ENTRY’ undeclared (first use in this function)
/home/travis/build/mongodb/mongo-php-driver/php_phongo.c:1189:2: note: each undeclared identifier is reported only once for each function it appears in
/home/travis/build/mongodb/mongo-php-driver/php_phongo.c:1207:4: error: implicit declaration of function ‘RETURN’ [-Werror=implicit-function-declaration]
/home/travis/build/mongodb/mongo-php-driver/php_phongo.c: In function ‘php_phongo_make_mongo_client’:
/home/travis/build/mongodb/mongo-php-driver/php_phongo.c:1894:2: error: ‘ENTRY’ undeclared (first use in this function)
/home/travis/build/mongodb/mongo-php-driver/php_phongo.c:1996:1: error: no return statement in function returning non-void [-Werror=return-type]

This is because this header is incorrectly required to be included in previous mongoc master.
This has been fixed in mongoc master so phongo just needs to bump its submodule.

However, bumping the submodule hits other unrelated failures, mostly due to configuration related things (e.g. missing things in mongoc-config.h, missing PHP_ADD_SOURCES etc).

When the submodule is bumped, you will no longer be able to include mongoc-log.h like this though, hence the PR. See https://jira.mongodb.org/browse/CDRIVER-1408

[jmikola]

Folding this into #362.